@@ -423,7 +423,7 @@ static ssize_t btrfs_nodesize_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
- return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->nodesize);
+ return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->nodesize);
}
BTRFS_ATTR(, nodesize, btrfs_nodesize_show);
@@ -433,8 +433,7 @@ static ssize_t btrfs_sectorsize_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
- return snprintf(buf, PAGE_SIZE, "%u\n",
- fs_info->super_copy->sectorsize);
+ return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->sectorsize);
}
BTRFS_ATTR(, sectorsize, btrfs_sectorsize_show);
@@ -444,8 +443,7 @@ static ssize_t btrfs_clone_alignment_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
- return snprintf(buf, PAGE_SIZE, "%u\n",
- fs_info->super_copy->sectorsize);
+ return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->sectorsize);
}
BTRFS_ATTR(, clone_alignment, btrfs_clone_alignment_show);
@@ -1727,19 +1727,23 @@ static void update_super_roots(struct btrfs_fs_info *fs_info)
super = fs_info->super_copy;
+ /* update latest btrfs_super_block::chunk_root refs */
root_item = &fs_info->chunk_root->root_item;
- super->chunk_root = root_item->bytenr;
- super->chunk_root_generation = root_item->generation;
- super->chunk_root_level = root_item->level;
+ btrfs_set_super_chunk_root(super, root_item->bytenr);
+ btrfs_set_super_chunk_root_generation(super, root_item->generation);
+ btrfs_set_super_chunk_root_level(super, root_item->level);
+ /* update latest btrfs_super_block::root refs */
root_item = &fs_info->tree_root->root_item;
- super->root = root_item->bytenr;
- super->generation = root_item->generation;
- super->root_level = root_item->level;
+ btrfs_set_super_root(super, root_item->bytenr);
+ btrfs_set_super_generation(super, root_item->generation);
+ btrfs_set_super_root_level(super, root_item->level);
+
if (btrfs_test_opt(fs_info, SPACE_CACHE))
- super->cache_generation = root_item->generation;
+ btrfs_set_super_cache_generation(super, root_item->generation);
if (test_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags))
- super->uuid_tree_generation = root_item->generation;
+ btrfs_set_super_uuid_tree_generation(super,
+ root_item->generation);
}
int btrfs_transaction_in_commit(struct btrfs_fs_info *info)
Moving between opposite endianness will report bogus numbers in sysfs, and mount may fail as the root will not be restored correctly. If the filesystem is always used on a same endian host, this will not be a problem. Fix this by using the btrfs_set_super...() functions to set fs_info::super_copy values, and for the sysfs, use the cached fs_info::nodesize,sectorsize values. Cc: stable@vger.kernel.org Signed-off-by: Anand Jain <anand.jain@oracle.com> --- v2->v3: Added sysfs.c fixes. Update change log. Update $Subject. Old: [PATCH v2] btrfs: fix endianness compatibility during the SB RW v1->v2: Update change log. Update $Subject. Old: [PATCH] btrfs: use set functions to update latest refs to the SB fs/btrfs/sysfs.c | 8 +++----- fs/btrfs/transaction.c | 20 ++++++++++++-------- 2 files changed, 15 insertions(+), 13 deletions(-)